<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>数组</title>
</head>
<script src="test.js"></script>
<link rel="stylesheet" href="arrthem.css"/>
<body>
<button type="button" onclick="test1()">数组1</button>
<br><br>

<button type="button" onclick="test2()">数组2</button>
<br><br>

<button type="button" onclick="test3()">indexof</button>
<br><br>
</body>
</html>